JPH09188293A - Work barge for laver culture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the acid treatment efficiency by making the time where the processing liquid touches the outdoor air short to reduce degradation of the processing liquid in an acid treatment tub. SOLUTION: In a work barge for layer culture where a guide rail 4 which guides a layer network 9, extending in the longitudinal direction of a hull 1 and is guided from the front part of the hull onto the hull, to the back of the hull, and an acid treatment tub 7 which acid-treats the laver network 9 are provided, and the acid treatment tub 7 has a processing liquid delivery pipe 72 which supplies the processing liquid in its front part and also has a collection pipe 71 which collects the processing liquid in the rear part, the load center position 18 of a load received by the hull 1 from the laver network 9 is made to be disposed in the backward of the buoyancy center position 16 of the hull 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seaweed aquaculture work vessel.

[0002]

2. Description of the Related Art Conventionally, as this type of laver cultivation work boat, a laver net guide is mounted on the upper part of the hull, and the front end of this guide is projected forward from the bow and the front end is submerged below the sea surface. It is known that the seaweed net is guided on a ship by advancing toward the seaweed net in a state, and the seaweed is continuously collected on the ship. That is, the laver cultivation work boat is provided with a laver net guide on its hull, and the guide extends to the stern side just above the laver cutting device at the front of the hull and above the bridge. An acid treatment tank is provided along the net guide. Then, the pump supplies the treatment liquid (acid liquid) in the treatment liquid tank to the upstream end of the acid treatment tank, and collects the treatment liquid from the downstream end of the acid treatment tank to the treatment liquid tank. Then, by moving the ship forward, the seaweed net on the sea is scooped up and moved in the stern direction along the seaweed guide, while the seaweed adhering to the seaweed is cut off by the seaweed cutting device and then passed through the acid treatment tank. As a result, the seaweed net is immersed in the treatment liquid for acid treatment.

[0003]

In the above structure, the treatment liquid flowing in the acid treatment tank flows from the front part to the rear part along with the movement of the seaweed net. It will gradually deteriorate. In addition, since the seaweed net scooped from the sea and reaching the acid treatment tank contains seawater, seawater tends to accumulate in the rear part of the acid treatment tank, which lowers the acid concentration and causes acid treatment. There is a problem of reduced efficiency.

The present invention has been made to solve such a conventional problem, and shortens the time during which the treatment liquid is exposed to the outside air in the acid treatment tank to reduce the deterioration of the treatment liquid. Further, the present invention provides an acid treatment device for a seaweed aquaculture work ship, which prevents deterioration of the acid treatment efficiency at the rear part of the acid treatment tank.

[0005]

According to a first aspect of the present invention, there is provided a guide member which extends in the longitudinal direction of the hull and guides the seaweed net guided from the front part of the hull onto the hull to the rear of the hull, and the nori net is acidified. An acid treatment tank for treatment is provided, and this acid treatment tank has a supply port for supplying the treatment liquid at its front part and a recovery port for collecting the treatment liquid at its rear part, for seaweed cultivation work In a ship, the load center position of the load that the hull receives from the seaweed net is located behind the buoyancy center position of the hull.

In the present invention, since the acid treatment tank has the supply port for supplying the treatment liquid at the front part and the recovery port for collecting the treatment liquid at the rear part, the treatment liquid is stored in the acid treatment tank. It will flow from the front to the rear, but when the hull's hull's load center position is located behind the hull's buoyancy center position and the hull sunk below the nori net, The hull is tilted rearward so that the side is lower than the bow side, and the processing liquid is allowed to easily flow from the front part to the rear part in the acid treatment tank due to its gravity. For this reason, the time during which the treatment liquid flows on the surface of the acid treatment tank is shortened, and the time when the treatment liquid is exposed to the outside air is shortened (the treatment liquid can be quickly recovered from the inside of the acid treatment tank). It is possible to prevent deterioration of the liquid.

The above-mentioned guide member is a concept including not only the member on the hull which the seaweed net comes into contact with when moving on the hull, that is, the guide rail extending in the length direction of the hull, but also the acid treatment tank. is there. Further, the seaweed net work vessel does not have to be equipped with a mowing device for mowing the seaweed. Further, the buoyancy center position of the hull referred to in each of the above claims refers to the buoyancy center position of the hull before the hull dives under the nori net.

According to a second aspect of the present invention, there is provided a guide member which extends in the longitudinal direction of the hull and guides the seaweed net guided to the hull from the front of the hull to the rear of the hull, and a treatment liquid for treating the seaweed net with acid. In the ship for seaweed aquaculture work, a ship is provided with a guide member that extends in the ship width direction and abuts on the upper surface of the seaweed net. The load center position of the load received is located behind the buoyancy center position of the hull.

According to the present invention, a treatment liquid reservoir for accommodating the treatment liquid for treating the seaweed net is provided, and the load center position of the load received from the seaweed net by the hull is located behind the buoyancy center position of the hull. Therefore, when the hull dives below the seaweed net, the hull leans backward so that the stern side becomes lower than the bow side due to the load received from the seaweed net. Therefore, the liquid in the processing liquid reservoir is inclined with respect to the bottom surface of the processing liquid reservoir so that the liquid becomes deeper toward the stern side, and the depth of the processing liquid behind the guide member is the guide member. It becomes deeper than the depth of the processing liquid in front.

By the way, since the guide member is in contact with the upper surface of the seaweed net and the seawater adhering to the seaweed is squeezed here, the time during which the seaweed net is immersed in the treatment liquid behind the guide member is reduced. It is preferable to take a long time in order to effectively carry out the acid treatment.

According to the present invention, as described above, the depth of the treatment liquid behind the guide member becomes deeper than the depth of the treatment liquid in front of the guide member when the hull dives below the seaweed net. As a result, after the seawater attached to the seaweed is squeezed by the guide member, the time when the seaweed net is immersed in the treatment liquid can be extended, and the acid treatment can be effectively performed.

According to a third aspect of the present invention, the seaweed cultivation work vessel is provided with a seaweed storehouse for storing seaweed at the front of the hull, and the center position of the seaweed storehouse in the front-rear direction is located in front of the buoyancy center position. The center position of the seaweed in the front-rear direction and the load center position of the load that the hull receives from the seaweed net are distributed before and after the buoyancy center position.

According to the present invention, when the seaweed is stored in the seaweed, a downward load due to the stored seaweed acts on the center of the seaweed in the front-rear direction, so that the front part of the hull sinks and the ship leans forward. However, in the above configuration, the center position of the seaweed in the front-rear direction and the load center position of the load that the hull receives from the seaweed net are arranged before and after the buoyancy center position of the ship. Even if the seaweed is stored in the vessel, if the hull dives below the seaweed net, the hull will tilt backward so that the stern side will be lower than the bow side, and the treatment liquid will be gravitationally fed to the acid treatment tank. It becomes easier to flow through the inside from the front part to the rear part, and the amount of processing liquid accumulated in the rear part of the processing liquid reservoir becomes larger than that in the front part, making it possible to perform acid treatment effectively. Become.

Incidentally, the fact that the load center position of the load received from the seaweed net by the hull is located behind the buoyancy center position of the hull means that the hull sunk under the seaweed net from the position just before the seaweed net. When moving to the position, it can be visually recognized by tilting the hull so that the stern side becomes lower than the bow side.

That is, when the hull moves backward from the position immediately in front of the nori net to the position under the nori net, if the hull leans backward so that the stern side becomes lower than the bow side, the hull net It is assumed that the load center position of the load received from is behind the buoyancy center position of the hull.

Further, "the center position of the seaweed in the front-rear direction and the load center position of the load that the hull receives from the seaweed net are arranged before and after the buoyancy center position" mean that Even when more than half the amount of seaweed is stored in the seaweed warehouse, when the hull moves from the position immediately in front of the seaweed net to the position under the seaweed net, the stern side is more than the bow side. It is visible when the hull tilts backwards to a lower position.

[0017]

FIG. 1 is a side view showing an embodiment of the present invention, in which the upper half of the hull is shown on the upper side and the lower half of the hull is shown on the lower side. The plan view of FIG. 1 and the plan view of the front half of the hull of FIG. 1 are shown on the lower side.
In these figures, the seaweed work boat 1 is provided with a bridge 3 at the rear of its hull, and the floor 300 of this bridge 3 is formed lower than the front deck 19 and the rear stern deck 14, whereby the people in the bridge 3 are 100 can also stand. An engine 10 is installed at the front bottom of the ship, a propeller 12 is rotatably driven by the engine 10 via a propeller shaft 11, is arranged at the stern bottom, and a steering plate 13 is arranged at the rear side. The propeller shaft 11 is rotatably held by a holding bracket 15. A pair of left and right stern thrusters 61 that generate thrust in the ship width direction are provided on the stern bottom, and a bow thruster 62 is provided on the bow bottom. In addition, in FIG. 1, a virtual line shows a normal trim state before the hull 1 dives under the seaweed net 9, and a solid line shows a state in which the hull 1 leans backward when the ship 1 dives under the seaweed net 9.

A guide rail 4 for nori net made of a pipe material is provided on the ship, and the guide rail 4 for nori net is provided.
A guide extension 41 is provided at the front end of the. A flip-up means 48 is provided at a base end portion of the guide extension portion 41, and the guide extension portion 41 is rotated about the flip-up means 48 from a state of a solid line to a state of a virtual line in FIG.
It is possible to jump up on the hull from the submerged state.

A connecting member 49 is attached to reinforce the left and right guide rails 4 by connecting them to each other, and the seaweed net passes through by sliding on the upper surfaces thereof. At this time, in order to reduce the sliding resistance, the guide rail 4 and the connecting member 49 are composed of an antifriction member (polished stainless steel) having a small sliding resistance.

Below the guide rail 4, a seaweed reaping device 5 is arranged near the bow portion.
A light 25 for illuminating the front is installed on the hull 1 in front of. This allows the reaper 5 to be used during night work.
The position of the seaweed net 9 with respect to the bow end can be confirmed without disturbing. A light 26 for illuminating the deck in front of the bridge 3 is also provided near the front end of the bridge 3. Further, at least on the rear surface of the column 43 extending upward from the front deck of the bridge 3 and having the upper end abutting the guide rail 4,
A process (black paint application or the like) for preventing the reflection of the light 26 is performed. Further, the mowing device 5 is installed at a height such that the front can be seen from between the lower surface of the mowing device 5 and the front end edge of the hull (between the lines of sight 101 and 102) (a field of view is secured).

The seaweed net guide rails 4 extend from the bow end to the rear of the stern end along both sides of the ship, and are supported by struts 43 on both sides of the ship, and gradually extend from the bow end to the vicinity of the bridge 3. Rise to bridge 3
At the rear, it gradually descends and extends to the rear of the stern end.

Further, as will be described later, in order that the load center position 18 of the load that the hull 1 receives from the seaweed net 9 is positioned behind the buoyancy center position 16 of the hull 1, the hull 1
The height of the guide rail 4 from the deck is set so that the hull 1 receives a large load from the seaweed net 9 behind the buoyancy center position 16. This utilizes the point that the further the guide rail 4 is from the deck, the larger the load that the hull 1 receives from the seaweed net 9 becomes.

A driver's seat 30 and a passenger's seat 31 are juxtaposed in the bridge 3, and a steering handle 33, an engine throttle and forward / reverse switching lever 34, an engine stop switch, etc. are arranged in front of the driver's seat 30. An operation panel 35 and a thruster operation lever 36, on which are arranged, are arranged. The thruster operating lever 36 is configured to simultaneously operate the stern thruster 61 and the bow thruster 62. Further, the steering wheel 33 and the thruster operation lever 36 are arranged so as to be laterally distributed with the operation panel 35 sandwiched therebetween, so that when the driver 100 operates one, the other is not obstructed and the operability is improved. .

Below the above-mentioned nori net guide rail 4, below the deck 19, there is formed a nori store 50 for storing the nori cut by the nori cutting device 5. Further, an acid treatment tank 7 is provided on the bridge 3, and the acid treatment tank 7 is composed of a substantially flat surface and has a cleaning surface 73 through which the seaweed net passes closely and a downstream surface thereof as shown in FIG. A treatment liquid groove (recovery port) 74 formed of a concave portion is formed, and extends from the front end portion of the bridge 3 to the rear side along the nori net guide rail 4. A treatment liquid injection pipe 72 extending in the ship width direction is installed at the upstream end of the cleaning surface 73, and a treatment liquid (acid liquid) is passed from the treatment liquid tank 70 described later through a supply pipe by a pump 791 to the treatment liquid injection pipe 72. Is supplied, and the treatment liquid is jetted onto the cleaning surface 73 from the jet ports formed in the treatment liquid jet pipe 72 at a predetermined pitch in the ship width direction.

On the lower surface of the processing liquid groove 74, recovery pipes 71 are connected at two positions in the width direction, and the tip of the recovery pipe (discharging pipe) 71 is connected to the processing liquid tank 70 installed therebelow. The processing liquid is collected in the processing liquid tank 70 through the collecting pipe 71. That is, as shown in FIG. 4, a pump 791 is attached to one side surface of the processing liquid tank 70, and the processing liquid intake pipe 79 is attached to the pump 791.
0 is connected, and the downstream end of the recovery pipe 71 is opened to the recovery unit 710 provided in the lid 700 of the processing liquid tank,
The recovery unit 710 is provided with a filter (not shown),
The recovered liquid from the recovery pipe 71 is passed through this filter so that seaweed or the like is filtered and recovered in the treatment liquid tank 70.

The side wall 76 is formed in an inverted U-shape in cross section, and vinyl chloride is contained in the groove opening downward.
Treatment liquid supply pipe 721 formed by FRP or the like
Is disposed, and the processing liquid injection pipe 72 disposed in the ship width direction is connected to the upstream end of the cleaning surface 73 at its tip. A processing liquid groove 74 is formed at the downstream end of the side groove 741 formed on both sides of the cleaning surface 73. The processing liquid groove 74 joins the both side grooves 741. The processing liquid discharge path is provided at the lowest portion of the processing liquid groove 74. A pair of left and right recovery pipes 71 are connected to each other. The phantom line in FIG. 3 shows the position of the acid treatment tank 7 in the normal trim state before the hull 1 dives under the seaweed net 9,
The solid line shows the acid treatment tank 7 that dips under the seaweed net 9 and tilts backward.
The position of is shown. In this way, when the hull 1 goes under the seaweed net 9 and the acid treatment tank 7 tilts backward, the treatment liquid supplied to the cleaning surface 73 is promptly flown to the downstream side.

FIG. 8 shows another embodiment of the acid treatment tank 7,
The structure other than the processing liquid reservoir is the same as the structure shown in FIGS. Behind the bridge 3, the acid treatment tank 7 of the above embodiment is provided.
Instead of this, a treatment liquid reservoir 75 is formed, and a guide roller (guide member) 79 extending in the ship width direction is placed on the treatment liquid reservoir 75, and the nori net 9 is pressed by the guide roller 79. This treatment liquid reservoir 75 is deeper than the acid treatment tank 7, and the treatment liquid is accumulated therein, and the guide roller 79 rotates on the seaweed net 9 moving in the accumulated treatment liquid. While trying to hold down the seaweed net 9. The seaweed net 9 has a curved V-shaped side surface and passes under the guide roller 79. The guide roller 79 is simply placed on the seaweed net 9, but is located downstream. The side walls prevent it from moving backwards,
Keep a constant position. The phantom line in FIG. 8 shows the position of the acid treatment tank 7 in a normal trim state before the hull 1 dives under the seaweed net 9, and the solid line dives under the seaweed net 9 and tilts backward. The position 7 is shown. Due to the rearward inclination of the hull 1, the depth of the processing liquid in the rear part of the processing liquid reservoir 75, that is, behind the guide roller 79 is smaller than the depth of the processing liquid in the front part of the processing liquid reservoir 75, that is, in front of the guide roller 79. Get deeper.

As the guide member, a guide roller 7 is used.
It is not limited to the rotary type such as 9 but may be a non-rotating type member such as a pipe member fixed to the treatment liquid reservoir 75, etc. In short, the seaweed net 9 may be immersed in the treatment liquid in the treatment liquid reservoir. Any member may be used as long as it is in contact with the upper surface of the seaweed net 9.

The guide roller 79 is only placed on the seaweed net 9 and moves slightly back and forth as the seaweed net moves. To prevent the back and forth movement, the guide roller 79 is pivotally supported. A receiving portion for performing the treatment may be provided in the processing liquid reservoir 75. As this receiving portion, a known receiving portion structure that allows the hanging rope 92 extending to both sides of the seaweed net 9 to pass therethrough may be adopted.

A radar 21 is provided at the rear end of the acid treatment tank 7.
The radar 21 is constructed so as to be tilted rearward about the base end, and the upper portion thereof is guided by the guide rail 4
It is configured to move vertically between the upper side and the lower side. Then, as shown in FIG. 9, a cover plate 22 that covers the radar 21 is provided between the radar 21 in the lowered position and the seaweed net 9 passing above the radar 21. That is, between the guide rails 4 on both sides, support members 23 extending parallel to each other in the front-rear direction are provided, and grooves 24 facing each other are formed in the support members 23. Is inserted and slid in the front-back direction.

Further, as shown in FIGS. 5 to 7, a plurality of columns 91 whose lower end portions are buried in the seabed are arranged at regular intervals, and the seaweed net 9 is connected between these columns 91 via a hanging rope 92. ing. The seaweed net 9 is provided with the drawing rods 93 at regular intervals in the lengthwise direction to keep the net stretched. As shown in FIG.
It is held by sling rope 92 from diagonally above so as to float above. On the other hand, on the left and right guide rails 4 near the front of the mowing device 5 on the hull 1, flexible (glass fiber) antennas 2 projecting upward are installed. Then, as shown in FIG. 7B, when the hull 1 sunk under the nori net 9 and the nori net 9 moves on the nori net guide rail 4, the hanging rope 92 sags and the part of the cutting device 5 is slackened. There is a risk of being caught in the reaper 5 when passing through. However, the antenna 21 is installed on the front side of the reaper 5,
The antenna 21 bends when the hanging rope 92 is caught, and the hanging rope 92 is passed over the cutting device 5 with the hanging rope 92 being lifted. That is, when the antenna 21 is largely bent rearward,
As shown in, the tip of the antenna 2 is located rearward of the front end of the cutting device 5. Thereby, the antenna 2
When the hanging rope 92 caught on the
The hanging rope 92 is made to fall on the guide rail 4 rearward of the mowing device 5, so that the hanging rope 92 is cut.
It is possible to surely prevent being caught in.

The mounting position and length of the antenna 21 are set so that when the hanging rope 92 is disengaged from the antenna 2, the hanging rope 92 falls on the guide rail 4 behind the cutting device 5. It suffices that the tip of the antenna 21 be located rearward of the rear end of the mowing device 5 when the antenna 21 is largely bent rearward.

In the above structure, during normal traveling, the guide extension portion 41 is positioned on the ship as indicated by the chain double-dashed line in FIG. 1, and the ship travels forward in this state. During the seaweed mowing work in the aquaculture farm, the guide extension 41 is projected forward of the bow by the flip-up means 48 to immerse the tip below the sea surface 90, and the ship is advanced at a slight speed while the sea surface 90 is being advanced.
Head to the seaweed net 9 above. At this time, the propeller 12 and the rudder blade 13 are raised, and the bow thruster 62 and the stern thruster 61 are actuated to perform the fine speed forward movement and the course adjustment of the ship. Further, a light 25 for illuminating the front is provided on the hull 1 in front of the mowing device 5, so that the mowing device 5 does not get in the way at night work,
In order to confirm the position of the seaweed net 9 at the end of the bow, the area around the bow can be illuminated.

As the hull 1 advances, the seaweed net 9 on the sea surface 90 is picked up by the guide extension portion 41 and moved on the hull 1 along the seaweed net guide rail 4 in the stern direction. At this time, since at least the upper surface of the guide rail 4 and the like is composed of a friction reducing member having a small sliding resistance, when the seaweed net 9 moves on the guide rail 4, the seaweed adhered to the seaweed net is guided by the guide rail 4. It can be prevented from tearing due to sliding resistance such as 4 and the seaweed is nori net 9
Can be prevented from being unevenly torn and adversely affecting its growth. While the seaweed net 9 moves on the guide rail 4, the seaweed cutting device 5 cuts off the seaweed attached to the seaweed net 9, and the cut seaweed is dropped into the seaweed storage 50 below.

A connecting member 49 extending in the width direction of the ship
Since the seaweed net 9 tends to become a resistance of the seaweed net 9 when the seaweed net 9 moves in the length direction of the ship, it is necessary to configure at least the upper surface of the connecting member extending in the ship width direction with the anti-friction member. It is preferable to prevent the mesh 9 from being torn unevenly. Further, when the guide rail 4 or the upper surface of the connecting member 49 is constituted by the antifriction member, it is not necessary to form the entire guide rail 4 or the connecting member 49 by a polished stainless steel pipe as in the above embodiment. Alternatively, only the upper surface of the guide rail 4 or the connecting member 49 may be polished, or a coating material that reduces sliding resistance may be applied only to the upper surface.

The seaweed net 9 from which the seaweed was cut is a bridge 3
The acid treatment is carried out by passing over the acid treatment tank 7.
At this time, the hull 1 dives under the nori net 9 and the nori net 9
Since the load center position 18 of the hull 1 acts rearward of the buoyancy center position 16 of the hull 1 and the hull 1 is tilted backward, the treatment liquid supplied to the cleaning surface 73 promptly moves to the downstream side. As a result, the seaweed net 9 is supplied with a sufficient amount of treatment liquid, and the acid treatment is favorably performed.

Further, in the above structure, when the seaweed is stored in the seaweed storage 50, the downward load due to the stored seaweed is
Since the hull 1 tends to be tilted forward because the front part of the hull 1 is depressed because it acts almost at the center position 17 of the seaweed container 50 in the front-rear direction,
Since the load center position 18 of the load received from the seaweed net 9 is arranged before and after the buoyancy center position 16 of the hull 1, even if the seaweed is stored in the seaweed storage 50,
If the hull 1 dives below the seaweed net 9, the hull 1 will be tilted backward so that the stern side will be lower than the bow side, and the processing liquid will move from the front part to the rear part in the acid treatment tank 7 due to its gravity. It becomes easy to flow and the acid treatment can be effectively performed.

The treatment liquid subjected to the acid treatment is treated in the treatment liquid groove 74.
Is returned to the treatment liquid tank 70 through the recovery pipe 71, and the treatment liquid in the treatment liquid tank 70 is sent by the pump 791 to the acid treatment liquid injection pipe 72 through the pipes 790, 792, 721 and jetted onto the cleaning surface 73. To be done. In addition,
As the hull 1 dive under the seaweed net as described above, the hull 1 is tilted backward, and the buoyancy center position 16 moves to 16A and the center of gravity 160 of the hull 1 moves to 160A, respectively.

Further, in the configuration of FIG. 8, when the hull sunk below the seaweed net 9 to receive a downward load from the seaweed net 9, the liquid in the processing liquid reservoir 75 goes toward the stern side. The liquid surface inclines so as to become deeper with respect to the bottom surface of the processing liquid reservoir 75, and the depth of the processing liquid behind the guide member becomes deeper than the depth of the processing liquid ahead of the guide member.

By the way, since the guide member is in contact with the upper surface of the seaweed net and the seawater adhering to the seaweed is squeezed here, the time when the seaweed net is immersed in the treatment liquid behind the guide member is reduced. It is preferable to take a long time in order to effectively carry out the acid treatment.

In the present invention, as described above, the depth of the treatment liquid behind the guide member becomes deeper than the depth of the treatment liquid in front of the guide member when the hull dives under the seaweed net. As a result, after the seawater attached to the seaweed is squeezed by the guide member, the time when the seaweed net is immersed in the treatment liquid can be extended, and the acid treatment can be effectively performed.

When the seaweed net 9 passes through, the radar 21 is placed in the lowered position and the upper side thereof is covered with the cover plate 22 to prevent the radar 21 from interfering with the work, and further the seaweed. The cover plate 22 also prevents the seaweed falling from the net 9 from hitting the radar 21. The cover plate 22 is of a slide type, and covers the lowered radar 21 and the lowered radar 2.
Since it is configured so that it can be slid between a position displaced from above 1 and a position displaced from above, the cover plate 22 can be slid to a position displaced from above the lowered radar 21. Well, it is not necessary to remove the cover plate 22 and the work is easy.

[0043]

According to the first aspect of the invention, the acid treatment tank has a supply port for supplying the treatment liquid at its front part and a recovery port for recovering the treatment liquid at its rear part. Will flow from the front to the rear in the acid treatment tank, but the hull's hull's center of load is located behind the hull's buoyancy center and the hull is below the nori's net. When hiding, the hull is tilted rearward so that the stern side becomes lower than the bow side, and the gravity makes it easier for the treatment liquid to flow from the front portion to the rear portion in the acid treatment tank. For this reason, the time during which the treatment liquid flows on the surface of the acid treatment tank is shortened, and the time when the treatment liquid is exposed to the outside air is shortened (the treatment liquid can be quickly recovered from the inside of the acid treatment tank). It is possible to prevent deterioration of the liquid.

According to the second aspect of the present invention, a treatment liquid reservoir for accommodating the treatment liquid for acid treatment of the seaweed net is provided, and the load center position of the load received by the hull from the seaweed net is more than the buoyancy center position of the hull. Since it is located rearward, when the hull dives below the seaweed net, the hull leans backward so that the stern side is lower than the bow side due to the load received from the seaweed net. Therefore, the liquid in the processing liquid reservoir is inclined with respect to the bottom surface of the processing liquid reservoir so that the liquid becomes deeper toward the stern side, and the depth of the processing liquid behind the guide member is the guide member. It becomes deeper than the depth of the processing liquid in front.

By the way, since the guide member is in contact with the upper surface of the seaweed net and the seawater adhering to the seaweed is squeezed here, the time during which the seaweed net is immersed in the treatment liquid behind the guide member is reduced. It is preferable to take a long time in order to effectively carry out the acid treatment.

In the present invention, as described above, when the hull sunk below the seaweed net, the depth of the treatment liquid behind the guide member becomes deeper than the depth of the treatment liquid ahead of the guide member. As a result, after the seawater attached to the seaweed is squeezed by the guide member, the time when the seaweed net is immersed in the treatment liquid can be extended, and the acid treatment can be effectively performed.

According to the third aspect of the present invention, when the seaweed is stored in the seaweed storehouse, the downward load of the stored seaweed acts on the center of the seaweed storehouse in the front-rear direction. However, in the above configuration, the center position of the seaweed in the front-rear direction and the load center position of the load that the hull receives from the seaweed net are distributed before and after the buoyancy center position of the ship. Even if the seaweed is stored in the seaweed container, if the hull dives below the seaweed net, the hull will tilt backward so that the stern side will be lower than the bow side, and the processing liquid will be affected by its gravity. Effectively perform acid treatment by facilitating the flow from the front part to the rear part in the acid treatment tank, or by increasing the amount of treatment liquid that accumulates in the rear part of the treatment liquid reservoir than that in the front part. Will be possible.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention, in which a rear half of a hull is shown on an upper side and a front half of the hull is shown on a lower side.

FIG. 2 is a plan view of FIG. 1, showing the rear half of the hull on the upper side and the front half of the hull on the lower side.

FIG. 3 is a vertical sectional view of an acid treatment tank.

FIG. 4 is a perspective view showing a circulation system of a processing liquid.

FIG. 5 is an enlarged side view of a bow hull.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 (a) is a front view showing the installation state of the seaweed net,
(B) is a front view showing a state in which the hull scoops up the seaweed net.

FIG. 8 is an enlarged side view of a stern hull showing another embodiment of the acid treatment tank.

9 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Hull 2 Antenna 3 Bridge 4 Nori net guide rail 5 Mowing device 7 Acid treatment tank 9 Nori net 10 Engine 16 Hull buoyancy center point 17 Seaweed load center point 18 Seaweed buoyancy center point 21 Radar 50 Nori seaweed Warehouse 75 Treated liquid reservoir 91 Laver net prop 92 Suspended rope

Claims (3)

[Claims] 1. A guide member, which extends in the longitudinal direction of the hull and guides the seaweed net guided from the front of the hull onto the hull to the rear of the hull, and an acid treatment tank for acid-treating the seaweed net. This acid treatment tank has a supply port for supplying the treatment liquid at its front part and a recovery port for recovering the treatment liquid at its rear part. A seaweed aquaculture work boat characterized in that the center of load is located behind the center of buoyancy of the hull. 2. A guide member that extends in the longitudinal direction of the hull and guides the seaweed net guided from the front of the hull onto the hull to the rear of the hull, and a treatment liquid containing a treatment liquid for acid-treating the seaweed net. In a seaweed aquaculture work ship, in which a reservoir is provided, and a guide member that extends in the ship width direction and abuts against the top surface of the seaweed net is provided in the treated liquid sump, the load center of the load that the hull receives from the seaweed net A seaweed aquaculture work boat characterized by being positioned rearward of the center of buoyancy of the hull. 3. The seaweed cultivation work vessel is provided with a seaweed storehouse for storing seaweed at the front of the hull, and the center position of the seaweed storehouse in the front-rear direction is located in front of the buoyancy center position. The seaweed aquaculture work vessel according to claim 1 or 2, wherein the center position in the front-rear direction and the load center position of the load received from the seaweed net by the hull are arranged before and after the buoyancy center position.